research/transmission_spectroscopy/universesim/src/video.c

   1 /*
   2  */
   3 #include <video.h>
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <zlib.h>
   7
   8 #define DUMP_FRAMES     0
   9
  10 #define USE_SDL 1
  11 #define USE_ACESS       0
  12
  13 #if USE_SDL
  14 # include <SDL/SDL.h>
  15
  16 // === GLOBALS ===
  17  int    giFrameNum = 0;
  18 #if DUMP_FRAMES
  19 gzFile  *gVideoFile = NULL;
  20 #endif
  21 SDL_Surface     *gScreen;
  22
  23 // === CODE ===
  24 void Video_SetResolution(int Width, int Height)
  25 {
  26         if(!gScreen) {
  27                 SDL_Init(SDL_INIT_VIDEO);
  28                 atexit(SDL_Quit);
  29         }
  30         else {
  31                 SDL_FreeSurface(gScreen);
  32         }
  33
  34         gScreen = SDL_SetVideoMode(Width, Height, 32, SDL_DOUBLEBUF);
  35
  36         #if DUMP_FRAMES
  37         if(gVideoFile)  gzclose(gVideoFile);
  38
  39         gVideoFile = gzopen("universe.mv", "wb");
  40         gzwrite(gVideoFile, &gScreen->pitch, 2);
  41         gzwrite(gVideoFile, &gScreen->h, 2);
  42         #endif
  43 }
  44
  45 void Video_SetName(const char *Format, ...)
  46 {
  47         char    buf[1024];
  48         va_list args;
  49         va_start(args, Format);
  50         vsprintf(buf, Format, args);
  51         SDL_WM_SetCaption(buf, "Universe Simulator");
  52         va_end(args);
  53 }
  54
  55 void Video_PSet(int X, int Y, uint8_t R, uint8_t G, uint8_t B)
  56 {
  57         uint8_t *buf = gScreen->pixels;
  58
  59         buf[Y*gScreen->pitch + X*4] = B;
  60         buf[Y*gScreen->pitch + X*4+1] = G;
  61         buf[Y*gScreen->pitch + X*4+2] = R;
  62         buf[Y*gScreen->pitch + X*4+3] = 0;
  63 }
  64
  65 void Video_Flip(void)
  66 {
  67         #if DUMP_FRAMES
  68         gzwrite(gVideoFile, gScreen->pixels, gScreen->pitch*gScreen->h);
  69         #endif
  70
  71         SDL_Flip(gScreen);
  72 }
  73
  74 void *Thread_Create(void *Function, void *Argument)
  75 {
  76         return SDL_CreateThread(Function, Argument);
  77 }
  78
  79 void Thread_Yield(void)
  80 {
  81         SDL_Delay(0);
  82 }
  83
  84
  85 #elif USE_ACESS
  86 # error "TODO - Acess FB Output"
  87 #endif